A steel support tube, cast legs, leveling screws, and a laminated table top make this unit very stable and highly functional for the study of equilibrium of force. It is supplied with four all-metal precision pulleys, 2 large force rings, 8 small force rings, cords, 4-50 gram weight hangers, slotted weights and instructions. The slotted weights included are 8 each-5 gram, 4 each-10 gram, and 36 each -20 gram. An instruction manual is also included. (16-1/2" x 16-1/2" x 5-1/4"; 15.5lbs).

Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.